Spinning or roving machine.



No. 707,462. Patented Aug. I9, I902. W. V. THRELFALL.

SPINNING 0B SEWING MACHINE.

(Application filed Apr. 19, 1902.) (No Model.) 2 Shouts$heat I.

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Patented Aug. I9, I902. I w. v. THRELFALL.

SPINNING 0R RDVING MACHINE.

(Application filed. Apr. 19, 1902.) i

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WILLIAM V. THRELFALL, OF BIDDEFORD, MAINE, ASSIGNOR TO SACO &' PETTEE MACHINE SHOPS, OF NEWTON, MASSACHUSETTS, A CORPO- RATION OF MASSACHUSETTS.

SPINNING OR ROVING MACHINE.

SYEGIFIGATION formingpart of Letters Patent No. 707,462, dated August 19, 1902.

Application filed April 19, 1902. Serial No. 103,759. (No model.)

To to 1071/0777 it may concern..-

Beit known that LWILLIAM V.THRELFALL, a citizen of the United States, and a resident of Biddeford, in the county of York and State of Maine, have invented a new and useful Improvement in Spinning or Roving Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification, in explaining itsnature.

The invention relates to that part of a spinning or roving machine which governs the traversing motion of the throats throughwhich the rovings or yarns pass to the rolls and with respect to such rolls. Its object is to correct imperfections in the action of such devices as are now commonly employed and which because of their structure cause the throats to be held sufliciently long at the end of each traversing movement and at the center of said movement to cause by the rovings or yarns recesses or grooves to be formed in the upper pressure-rolls at such places thereon, and my invention obviates this objection by doing away with the dwelling of the throats at such points, while upon the other hand it preserves the desirable features of the present construction in that it acts toso move the throats between the ends as to secure and preserve the uniform wear of the upper pressurerolls, which is desirable.

The invention is represented as embodied in a device the essential elements of which are a lever, which is connected with the traverse throat-slide, provided with a combined variable movement by means of the conjoint action of an eccentric upon which the lever is pivoted and a cam sofashioned as to impart a variable, but continuous, movement and designed to prevent any dwelling of the lever and slide at the ends of the movements during reversal or at any intermediate points in the movement.

I will now describe the invention in detail in connection with the drawings forming a part of this specification, wherein- Figure 1 is a view in elevation of my improved apparatus. Fig. 2 is a view in vertical section upon the dotted line of Fig. 1, and

-ing-washer,

Fig. 3 is a view in horizontal section upon the dotted line of Fig. 1.

Referring to the drawings, A represents a stand, which is mounted upon any suitable support, preferably the roller-beam. means for its attachment to said roller-beam, and it has a face a, upon which is mounted, by suitable studs a a the gears B B. These gears are in line with each other and so attached to the stand as to present unobstructed faces. The gear B is adapted to be driven by a worm b, which is represented as upon the driven roll-shaft O of a spinning or roving machine, and this gear B meshes and drives the gear B, which is represented as slightly smaller than the gear B. Upon the face of the gear B is an eccentric Z), and upon the face of the gear B is a cam If. A lever D has at one end a hole d of a size to fit the eccentric and upon which the said end of the lever is carried and fulcrumed, and it also has at its other end an elongated hole d,which fits upon the cam b upon the face of the gear 13. The lever also has a long slot at at its free end, which receives one end of a connecting-pin extending from the arm 6 of the rock-lever E. This rock-lever is also mounted upon the stand by means of a pivotal stud. Its arm 6 has a slot 2, in which the connecting-pin d is longitudinally adjustable, and it also has an arm 6 having a cross-slot 6 which receives a connecting-pin e ,extending from the traverse throat slide or rail F. The slots in the bell-crank lever afford means whereby the device is adjusted to the slide or rail, and after adjustment the two pins are rigidly secured to the bell-crank lever. Each pin is provided with a threaded-end nut and clampby which upon the loosening thereof the adjustment may be secured, and by the tightening thereof the pins may be fastened in place. The slot 6 in the arm e and the slot d in the lever D also provide means for increasing or diminishing the extent of movement of the lever and the traverse of the slide or rail. The acting surface of the cam b is preferably shaped as repre sented in Fig. 1, and it is arranged to bear against the parallel surfaces at of the elon- It has I eccentric.

gated hole of the lever D, so that it acts to I mentor travel of the lever and of the slide or move the lever positively and continuously i rail to which I have referred.

in both directions and also so as to prevent any retardation of the traverse movement or dwelling at the reversal of the movement of the throat-slide at each end of its movement or at any other point therein. Both the eccentric and the cam are integral with their respective gears. The gearB, with. the eccentric,has a hole bithrough which the stud upon which it turns extends, and the threaded end of the stud holds a washer, which is attached thereto by a nut and which serves to hold the lever upon the eccentric. The gear'B, with its cam, has a hole 19 through which the stud upon which it turns extends, and a washer, held thereon bya nut, serves to hold the lever to the cam.

It will be seen that the lever is fulcrumed on the eccentric, which of course also provides it with a back-and-forth movement, and that this movement of the lever is modified by the action of the cam, which moves the moving lever slowly first in one direction and then in a reverse and at a time which bears a variable relation to the movement of the The combination of these two forces acting upon the lever provides its free end with a variable movement with a quick reversal, which when imparted to the slide or rail causes it to be moved continuously back and forth over a central point and to points which constantly varyin distance from the center, and also provides a quick reversing movement of the slide at each end of its traversing movement. This will cause the rovings or yarns carried by the slide or rail to be correspondingly moved with respect to the rolls of the roving or spinning machine, and will prevent the roving or yarn from remaining stationary at any point in its travers ing movement or during the reversal of the movement, and thus do awaywith the formation in the leather or surface of the upper rolls of grooves or other inequalities and will further act to keep the said lining smooth and level throughout the working length of the rolls.

While I have described the lever as fulcru med on an eccentric, I would say that any other means-such, for instance, as a crank could be used for this purpose as well, and while I have described the free end of the lever as acted upon by a cam of the character specified I would say that any other connection between the gear and the lever calculated to give the lever substantially the quick reversing movements and continuous variable travel herein indicated can be used.

It will be seen that the cam rotates somewhat faster than the eccentric revolves and that it is shaped to give variable movements to the lever, the time of which is constantly changing with respect to the regular movement of the eccentric, and this causes the variation in the extent of the traversing movei The mechanism is simple in organization and cheap to construct, as well as being ef fective in operation.

The stud a, carrying the gear B, is represented in Fig. 2 as passing through a vertical slot in the stand A, and this provides the stud and the gear with vertical adjustment with respect to the worm b. This is useful in the first setting-of the apparatus on the machine and also in such further adjustment as may be necessary to compensate for wear of worm and gear.

Having thus fully described myinvention, I claim and desire to secure by Letters Patent of the United States 1. In a machine of the character specified, the combination of a driven gear, an eccentric on its face, a second gear meshing with and driven by the first, a cam, constructed as specified, upon its face, a lever provided at one end with a hole to fit the eccentric on the first-named gear and at its other end with a slot to receive the cam upon said second gear, adapted to have an endwise movement imparted to it by the eccentric and a continuous crosswise and quick reversing movement by contact of said cam with coperating surfaces of said slot, the said cam beingadapted to impart substantially a single complete reciprocation to said lever at each rotation of the eccentric, the traverse slide or rail and a connection between said traverse slide or rail and said lever.

2. In a machine of the character specified, the combination of a driven gear, an eccentric on its face, a second gear meshing with and driven by the first but at a rate of rotation differing from that of the first, a cam, constructed as specified, upon its face, a lever provided at one end with a hole to fit the eccentric on the first-named gear and at its other end with a slot to receive the cam upon said second gear, adapted to have endwise movement imparted to it by the eccentric and a continuous crosswise and quick reversing movement by contact of said cam with cooperating surfaces of said slot, the said cam being adapted to impart substantially a single complete reciprocation to said lever at each rotation of the eccentric, the traverse slide or rail and a connection between said traverse slide or rail and said lever.

3. In a machine of the character specified, the combination of a stand, a driven gear mounted thereon, an eccentric on its face, a second gear mounted upon the stand meshing with and driven by the first at a rate of rotation difiering from that of the first, a cam, constructed as specified, upon its face, a lever provided at one end with a hole to fit the eccentric on the first-named gear and at its other end with a slot to receive the cam upon said second gear, adapted to have endwise movement imparted to it by the eccentric and a continuous crosswise and quick reversing movement by contact of said cam with cooperating surfaces of said slot, the said cam being adapted to impart substantially a single complete reciprocation to said lever at each rotation of the eccentric, the traverse slide or rail and a connection between said traverse slide or rail and said lever.

4. In a machine of the character specified, the combination of a driven gear, an eccentric on its face, a second gear meshing with and driven by the first and at a rate of rotation varying from that of the first, a cam, constructed as specified, upon its face, a lever connected with said eccentric and with said cam, to be continuously moved and rapidly reversed by their conjoint action, a second lever, an adjustable connection between the two levers, a traverse slide or rail and an ad justable connection between the second lever and said slide or rail.

5. In a machine of the character specified,

the combination of a driven gear, an eccentric on its face, a second driven gear adapted to be rotated at a rate varying from that of the first, a cam, constructed as specified, upon its face, a lever connected with said eccentric and with said cam to be positively and 0011- tinuously moved and rapidly reversed by their conjoint action, the said cam being adapted to impart substantially a single complete reciprocation to said lever at each rota tion of the eccentric, a traverse slide or rail and a connection between said slide or rail and said lever.

6. In a machine of the character specified, the combination of an eccentric, a cam, constructed as specified, and adapted to be rotated at a speed varying from that of the cocentric, a lever connected with said eccentric and with said cam, to be positively moved and with a continuous and variable stroke and to be quickly reversed by their conjoint action, said cam being adapted to impart substantially a single complete reciprocation to said lever at each rotation of the eccentric, a traverse slide or rail and a connection between said traverse slide or rail and said lever.

'7. In a machine of the character specified in combination with the drawing-rolls, a traversing throat slide or rail and means for imparting to it strokes varying in length but of uniform speed throughout and with a quick reversing movement at the end of each stroke, said means comprising an eccentric, a cam and a lever connecting said eccentric and said cam, and means operated thereby for imparting motion to said traversing throatslide, said cam being constructed to impart substantially a single complete reciprocation to said lever at each rotation of the eccentric.

8. In a machine of the character specified, the combination of a driven gear, an eccentric on its face, a second driven gear, a cam,

constructed as specified, upon its face, a lever connected with said eccentric and said cam to be positively and continuously moved by their conjoint action, a second lever having arms bearing an angular relation to each other, a connection between one of said arms and the first-named lever, a second connection between its other arm and the traverse slide or rail, and said traverse slide or rail.

9. In a machine of the character specified, the combination of a stand, a driven gear, an eccentric on its face, a second driven gear mounted upon said stand, having a rotation varying from that of the first gear, a cam, constructed as specified, upon its face, a lever connected with said eccentric and with said cam to be positively and continuously moved in strokes varying in length, and having a quick reversal by their conjoint action, a second lever pivoted to said stand, having arms angularly arranged with relation to each other, an adjustable connection between one of said arms and said lever, a connection between the other of said arms and the traverse slide or rail, and said traverse slide or rail.

10. In a machine of the character specified, the combination of an eccentric, a cam independent of the eccentric, constructed as specified and rotated at a speed varying from that of the eccentric, means for operating said eccentric and said cam, a lever connected with said eccentric and with said cam, to be positively and continuously moved in variable strokes at substantially the same speed throughout by their conjoint action, said cam being adapted to impart substantially a single complete reciprocation to said lever at each rotation of the eccentric, a traverse slide or rail, and an adjustable connection between said traverse slide or rail and said lever.

11. The combination in a machine of the character specified of a stand, two gears mounted thereon substantially side by side and so as to mesh with each other and havin g their faces exposed and one of which gears is driven by a worm, an eccentric-fulcrum on the face of one of said gears, a vibrator-cam upon the face of the other of said gears, a lever mounted upon said fulcrum and cam having a hole at one end to receive the fulcrum and an elongated slot at the other end to receive the cam, the said lever also having a slot in which an engaging pin or stud is adapted to play, a rock-lever mounted upon said stand having two arms, one of which has a longitudinal slot carrying a pin or stud which enters the pin-slot of saidlever, and the other of which has a cross-slot which carries a pin connecting it with the traverse slide or rail, and the said traverse slide or rail.

WILLIAM V. THRELFALL.

Witnesses:

F. F. RAYMOND, 2d, J. M. DOLAN. 

